Friday Harbor Airport Weather Forecast

    • 52
    • 69

    Increasing Clouds

    • 54
    • 69

    Chance Rain Showers

    • 53
    • 69

    Chance Rain Showers

    • 52
    • 69

    Rain Showers Likely

    • 52
    • 69

    Rain Showers Likely

    • 52
    • 70

    Chance Rain Showers

Today 5 Sep San Juan County

Sunny. Patchy dense fog in the morning. Haze through the day. Highs in the 60s to lower 70s. Light wind.

Tonight 5 Sep San Juan County

Partly cloudy. Haze. Patchy fog in the morning. A slight chance of Showers in the morning. Lows in the 50s. Light wind becoming southeast to 10 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Friday Harbor Airport Temperature Statistics

September Temperature

Friday Harbor Airport (0 miles)

  • Lowest 1 September, 2025

    52 °F

  • Average September

    59.7 °F

  • Highest 3 September, 2025

    75.9 °F

Climate (2020–Present)

Friday Harbor Airport (0 miles)

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  • Average Low 2020–2025

    44.3 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    59.6 °F
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